package other.nowcoder.easy;

import java.math.BigInteger;
import java.util.Scanner;

/**
 * @author bruin_du
 * @description 三角形
 * https://www.nowcoder.com/questionTerminal/c67a09062c0f4a5b964eef0945d3dd06
 * @date 2022/5/25 20:22
 **/
public class Triangle {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
            BigInteger a = new BigInteger(in.next());
            BigInteger b = new BigInteger(in.next());
            BigInteger c = new BigInteger(in.next());
            if(a.add(b).compareTo(c) > 0 &&
                a.add(c).compareTo(c) > 0 &&
                b.add(c).compareTo(a) > 0)
                System.out.println("Yes");
            else
                System.out.println("No");
        }
    }
}
